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'Air-gapped' computers, which are cut off from the internet in the interest of data sensitivity, have been shown to be vulnerable to data breaches from drones that read data from the pulsating light of their hard drive.

Researchers at the Ben-Gurion University of the Negev (BGU) demonstrated how data can be stolen from these machines' hard drives by reading the pulses of light on the LED drive using various types of cameras and light sensors.

The team used a Quadcopter drone, equipped with a camera, to peer inside the window of the room where the computer was located and receive the data transmitted by the LED.

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